There are many ways to contribute to the project! Games are complex things with a lot of moving parts that only exist because collaboration between creative and technical disciplines makes that happen. here are just a few ways you might be able to help out:
Make something! Anything! It doesn't need to be perfect or polished and it certainly doesn't have to be hooked up via code right away! Leave a little gift for the more technical/design-minded folks - their eyes will light up as they think of a dozen different ways it could be implemented as a weird new power-up or something.
learn more about submitting assets
See if there are any open issues to work on! These can range from bug reports to feature requests and some of them may even be tagged as a "good first issue" for new folks. You can also dig around in closed issues and check out what people are actively working on in pull requests.
learn more about making code changes
I think these folks get a bad rap (not just saying that because I'm one of them!!) - design is important and even though you can't throw a rock without hitting someone with a "good game idea", what you may not appreciate is how hard it actually can be to execute on! And I'm not talking about learning to code or create art to support your vision.... We have plenty of folks here who are already experts at those things! But at the same time, those same folks may not think about problems in the same creative way that you do.
Check out the discussions and issues to see if there are any conversations you might be able to contribute to and don't forget to join our discord to see what other folks are talking about!